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公开(公告)号：US4829342A
公开(公告)日：1989-05-09
申请号：US880207
申请日：1986-06-30
申请人： Tetsuharu Nishimura
发明人： Tetsuharu Nishimura
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： There is disclosed a moving state detection apparatus comprising optical unit for superposing a light beam of a specific order diffracted by a diffraction grating with a nondiffracted reference light beam; and light-receiving unit for receiving the superposed light beam from the optical means, the light-receiving unit being adapted to detect a change in contrast of interference fringes upon movement of said diffraction grating, and detect a moving state of the diffraction grating.
摘要翻译： 公开了一种移动状态检测装置，包括用于将由衍射光栅衍射的特定级别的光束与非衍射参考光束叠加的光学单元; 以及用于接收来自光学装置的重叠光束的光接收单元，所述光接收单元适于检测在所述衍射光栅移动时的干涉条纹的对比度的变化，并且检测衍射光栅的移动状态。
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公开(公告)号：US4677489A
公开(公告)日：1987-06-30
申请号：US774805
申请日：1985-09-11
申请人： Tetsuharu Nishimura , Hideo Yokota , Masatake Kato
发明人： Tetsuharu Nishimura , Hideo Yokota , Masatake Kato
CPC分类号： H04N5/2354
摘要： An image pickup apparatus including an electrical image sensor, means for detecting the reflection of a light beam incident on the image sensor, and control means for controlling the operation of the image sensor in accordance with the output of the detecting means so that the output signal of the image sensor has always a proper level.
摘要翻译： 一种包括电图像传感器的图像拾取装置，用于检测入射在图像传感器上的光束的反射的装置，以及用于根据检测装置的输出控制图像传感器的操作的控制装置，使得输出信号 的图像传感器始终处于适当的水平。
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公开(公告)号：US5198873A
公开(公告)日：1993-03-30
申请号：US789633
申请日：1991-11-12
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： An interferometer for measuring the displacement of a diffraction grating includes a multi-mode semiconductor laser for generating a laser beam; a device for supplying a predetermined current to the laser so that at least five vertical modes occur in an oscillation spectrum of the laser beam generated by the laser at an intensity ratio of at least 0.05; and an optical system for splitting the laser beam generated by the laser into first and second beams. The optical system also directs the first and second beams to the diffraction grating and effects interference between a first diffracted light beam generated by the diffraction of the first beam at the diffraction grating and a second diffracted light beam generated by the diffraction of the second beam at the diffraction grating to produce an interference light beam. Also provided is a photoelectric convertor for converting the interference light beam into an electrical signal.
摘要翻译： 用于测量衍射光栅位移的干涉仪包括用于产生激光束的多模半导体激光器; 用于向激光器提供预定电流的装置，使得在由激光器产生的激光束的振荡光谱中以至少0.05的强度比发生至少五个垂直模式; 以及用于将由激光器产生的激光束分成第一和第二光束的光学系统。 光学系统还将第一和第二光束引导到衍射光栅，并且在衍射光栅处的第一光束的衍射产生的第一衍射光束和由第二光束的衍射产生的第二衍射光束之间产生干涉 衍射光栅产生干涉光束。 还提供了一种用于将干涉光束转换成电信号的光电转换器。
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公开(公告)号：US4609272A
公开(公告)日：1986-09-02
申请号：US750685
申请日：1985-06-28
申请人： Hideo Yokota , Masatake Kato , Tetsuharu Nishimura
发明人： Hideo Yokota , Masatake Kato , Tetsuharu Nishimura
摘要： The disclosed finder system is constructed with three prisms. The first prism has a first entrance face, a first reflection face and a first exit face. The second prism has a second entrance face in contact with the first exit face, a second reflection face, and a second exit face. The third prism has a third entrance face in contact with the second exit face, a pair of roof-type reflection faces, a third reflection face in a common plane with the third entrance face, and a third exit face. Light entering through a photographic objective lens reflects from a quick return mirror to a focusing screen on which an image of an object forms. Light from the image reflects from the first reflection face to a direction parallel with an optical axis of the lens. The second reflection face then reflects the light progressively farther away from the optical axis to the pair of roof faces. The light then reflects progressively nearer the optical axis to the third reflection face, and then therefrom to an eyepiece for observing the finder image.
摘要翻译： 所公开的取景器系统由三个棱镜构成。 第一棱镜具有第一入射面，第一反射面和第一出射面。 第二棱镜具有与第一出射面接触的第二入射面，第二反射面和第二出射面。 第三棱镜具有与第二出射面接触的第三入射面，一对屋顶型反射面，与第三入射面在共同平面中的第三反射面和第三出射面。 通过摄影物镜进入的光从快速返回镜反射到形成对象的图像的聚焦屏幕。 来自图像的光从第一反射面反射到与透镜的光轴平行的方向。 第二反射面然后将光逐渐远离光轴反射到一对屋顶面。 然后，光逐渐靠近第三反射面的光轴，然后从那里反射到用于观察取景器图像的目镜。
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公开(公告)号：US4592636A
公开(公告)日：1986-06-03
申请号：US729292
申请日：1985-05-01
申请人： Masatake Kato , Tetsuharu Nishimura , Hideo Yokota
发明人： Masatake Kato , Tetsuharu Nishimura , Hideo Yokota
摘要： A view finder optical system comprises an optical path split mirror which divides a second optical axis from a first optical axis of an objective optical system; a predetermined image forming plane arranged on the second optical axis to have an image coming from the objective optical system formed thereon; a first prism arranged along the second optical axis to bring about reflection twice on the second optical axis and to have the incidence plane thereof and a second reflection plane on the same plane; a second prism which is disposed behind the first prism and is provided with a roof type reflection plane for a first reflection and a reflection plane for further reflecting the second optical axis after the second optical axis is reflected by the roof type reflection plane; and an eye-piece on the second optical axis after it comes out from the second prism. The spacing distance between the first optical axis and the optical axis passing through the eye-piece is shorter than a distance between the first optical axis and the predetermined image forming plane. An optical axis which passes through the exit plane of the first prism is arranged to be tilting to an axis which is perpendicular to the exit plane of the first prism.
摘要翻译： 取景器光学系统包括将第二光轴与物镜光学系统的第一光轴分开的光路分离镜; 布置在所述第二光轴上以具有形成在其上的物镜光学系统的图像的预定图像形成平面; 沿所述第二光轴布置的第一棱镜，以在所述第二光轴上产生两次反射并具有其入射面和在同一平面上的第二反射面; 第二棱镜，其设置在第一棱镜后面，并且在第二光轴被屋顶型反射面反射之后，设置有用于第一反射的屋顶型反射面和用于进一步反射第二光轴的反射面; 以及在从第二棱镜出来之后的第二光轴上的眼睛片。 第一光轴与通过眼睛片的光轴之间的距离比第一光轴和预定图像形成面之间的距离短。 穿过第一棱镜的出射平面的光轴布置成垂直于第一棱镜的出射平面的轴倾斜。
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公开(公告)号：US4967072A
公开(公告)日：1990-10-30
申请号：US481684
申请日：1990-02-20
申请人： Tetsuharu Nishimura
发明人： Tetsuharu Nishimura
CPC分类号： G01D5/38 , G01P13/045 , G01P3/366
摘要： A rotating condition detection apparatus includes a light source for illuminating a radial lattice having a plurality of lattice patterns marked on a periphery of a rotating body at an equi-angle; an optical unit for superimposing two refraction lights having a predetermined number of order reflected in two predetermined directions by the radial lattice; a photosensing device for sensing the superimposed light; and a detector for detecting a rotating condition of the rotating body in accordance with the output of the photosensing means.
摘要翻译： 旋转状态检测装置包括用于照射具有以等角的旋转体的周边上标记的多个格子图案的径向格子的光源; 光学单元，用于通过径向晶格将预定数量的次序反射的两个折射光叠加在两个预定方向上; 光敏装置，用于感测叠加的光; 以及检测器，用于根据光敏装置的输出来检测旋转体的旋转状态。
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公开(公告)号：US4868385A
公开(公告)日：1989-09-19
申请号：US196850
申请日：1988-05-17
申请人： Tetsuharu Nishimura
发明人： Tetsuharu Nishimura
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： A rotating state detection apparatus comprising, an optical device for detecting coherent beams toward a plurality of positions on a diffraction grating present along a rotational direction of a rotating object, an interfering device for superposing diffraction beams of a specific order with each other, the diffraction beams being diffracted at the plurality of different positions on the diffraction grating, and light-receiving device for receiving the superposed beams obtained by the interfering device, and for photoelectrically converting interference fringes formed by the superposed beams.
摘要翻译： 一种旋转状态检测装置，包括：用于检测沿着旋转对象的旋转方向存在的衍射光栅上的多个位置的相干光束的光学装置，用于叠加具有特定次序的衍射光束的干涉装置，衍射 在衍射光栅上的多个不同位置衍射的光束，以及用于接收由该干涉装置获得的叠加光束的光接收装置，以及用于光电转换由叠加的光束形成的干涉条纹。
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公开(公告)号：US5067813A
公开(公告)日：1991-11-26
申请号：US334197
申请日：1989-04-06
摘要： Disclosed is an optical apparatus which can be used for measuring displacement of an object. The apparatus includes an optical system for forming a linearly polarized beam whose polarization direction changes, a reflecting surface for reflecting the beam and for directing the beam in a predetermined direction, a photoelectric converter for photoelectrically converting a reflected beam directed in the predetermined direction, a polarizing device, arranged in an optical path of the reflected beam, for directing only a P-polarized beam or an S-polarized beam of the reflected beam toward the photoelectric converter.
摘要翻译： 公开了一种可用于测量物体的位移的光学装置。 该装置包括用于形成偏振方向变化的线性偏振光束的光学系统，用于反射光束并用于沿预定方向引导光束的反射表面，用于光电转换沿预定方向指向的反射光束的光电转换器， 偏振装置，布置在反射光束的光路中，用于仅将反射光束的P偏振光束或S偏振光束引向光电转换器。
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公开(公告)号：US4682237A
公开(公告)日：1987-07-21
申请号：US729293
申请日：1985-05-01
申请人： Masatake Kato , Tetsuharu Nishimura , Hideo Yokota
发明人： Masatake Kato , Tetsuharu Nishimura , Hideo Yokota
CPC分类号： H04N5/2254 , G03B19/12
摘要： A photographic optical apparatus including a beam splitter for splitting the optical path of an objective lens, a video pickup device arranged in one of the split optical paths, an optical low pass filter and a color separation filter arranged between the beam splitter and the video pickup device, a prism for changing the direction of the optical path arranged on the other split optical path, an eyepiece arranged on the optical path of the light coming through the prism, a pre-assumed image plane lying between the beam splitter and the prism and an image correcting plate of equal optical thickness to the sum of the lengths of the optical paths of the optical low pass filter and the color separation filter. The plate is arranged between the pre-assumed image plane and the beam splitter. The image correcting plate also serves to split off part of the light and then to guide it to a sensor for light metering.
摘要翻译： 一种摄影光学装置，包括用于分离物镜的光路的分束器，布置在分离光路之一中的视频拾取装置，光学低通滤波器和布置在分束器和视频拾取器之间的分色滤光器 装置，用于改变布置在另一分割光路上的光路的方向的棱镜，布置在通过棱镜的光的光路上的目镜，位于分束器和棱镜之间的预先假定的图像平面，以及 光学厚度相对于光学低通滤波器和分色滤光器的光路长度之和的图像校正板。 板被布置在预先假定的图像平面和分束器之间。 图像校正板还用于分离部分光，然后将其引导到用于测光的传感器。
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